/*

    File:       AuthenticationController.h

    Contains:   Runs an HTTP authentication challenge view.

    Written by: DTS

    Copyright:  Copyright (c) 2011 Apple Inc. All Rights Reserved.

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                The Apple Software is provided by Apple on an "AS IS" basis. 

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*/

#import <UIKit/UIKit.h>

// You typically run this view controller by:

//

// 1. creating it with an authentication challenge

// 2. setting yourself as the delegate

// 3. setting persistence to meet your requirements

// 4. presenting it modally

//

// When the user taps Log In or Cancel, your -authenticationView:didEnterCredential: 

// delegate callback will be called.  If credential is nil, it was a Cancel. 

//

// Finally, dismiss the view controller.  -authenticationViewDidDisappear: will be 

// called when it's all gone.

@protocol AuthenticationControllerDelegate;

@interface AuthenticationController : UIViewController

{

    UITextField *                           _userField;

    UITextField *                           _passwordField;

    UILabel *                               _realmLabel;

    UILabel *                               _passwordDispositionLabel;

    NSURLAuthenticationChallenge *          _challenge;

    NSURLCredentialPersistence              _persistence;

    NSURLCredential *                       _credential;

    id<AuthenticationControllerDelegate>    _delegate;

    BOOL                                    _showingAuthMethod;

}

- (id)initWithChallenge:(NSURLAuthenticationChallenge *)challenge;

@property (nonatomic, retain, readwrite) IBOutlet UITextField *     userField;

@property (nonatomic, retain, readwrite) IBOutlet UITextField *     passwordField;

@property (nonatomic, retain, readwrite) IBOutlet UILabel *         realmLabel;

@property (nonatomic, retain, readwrite) IBOutlet UILabel *         passwordDispositionLabel;

- (IBAction)logInAction:(id)sender;

- (IBAction)cancelAction:(id)sender;

@property (nonatomic, retain, readonly)  NSURLAuthenticationChallenge *         challenge;

    // This is the challenge passed to -initWithChallenge:.

@property (nonatomic, assign, readwrite) NSURLCredentialPersistence             persistence;

    // This allows you to control persistence of credential created by this class. 

    // You typically set this before activating the view controller, although it 

    // will be effective up to the point that credential is created.

@property (nonatomic, assign, readwrite) id<AuthenticationControllerDelegate>   delegate;

@property (nonatomic, retain, readonly)  NSURLCredential *                      credential;

    // The credential created by the user.  This will be nil if the taps Cancel, or 

    // if prior to the -authenticationView:didEnterCredential: delegate callback.

@end

@protocol AuthenticationControllerDelegate <NSObject>

@required

- (void)authenticationView:(AuthenticationController *)controller didEnterCredential:(NSURLCredential *)credential;

    // Called by AuthenticationController when the user either taps Cancel or 

    // Log In.  credential will be nil in the cancel case.

@optional

- (void)authenticationViewDidDisappear:(AuthenticationController *)controller;

    // Called by AuthenticationController when the view disappears.

@end